CAPE CANAVERAL, Fla. -- The six-person crew of the Space Shuttle Endeavour left its quarters at 11:50 p.m. (CST) to the cheers of NASA workers, and climbed into their silver Airstream van for their trip to Launch Pad 39B in anticipation of the 3:39 (CST) launch.

Mobile native Kay Hire one of Endeavour crew

There is some concern about weather, with only a 60 percent chance of launch, according to NASA officials. There is a possibility of clouds moving in from the north. For most of the weekend, it's been at 80 percent, with chance of strong winds to affect Launch Pad 39B